Tìm kiếm
Nam
giải HPT sau:
a, $\begin{cases} \dfrac{5x}{3}-\dfrac{2y}{5}=19 & \color{red}{(1)} \\ 4x+\dfrac{3y}{2}=21 & \color{red}{(2)} \\ \end{cases}$
b, $\begin{cases} \dfrac{4}{x+y-1}-\dfrac{5}{2x-y+1}=\dfrac{5}{2} & \color{red}{(1)} \\ \dfrac{3}{x+y-1}+\dfrac{2}{2x-y+1}=\dfrac{7}{5}& \color{red}{(2)} \\ \end{cases}$
c, $\begin{cases} 2\sqrt{x-1}-\sqrt{y-1}=1 & \color{red}{(1)} \\ \sqrt{x-1}+\sqrt{y-1}=2 & \color{red}{(2)} \\ \end{cases}$
d,$\begin{cases} mx+y=3m-1 & \color{red}{(1)} \\ x+my=m+1\sqrt{x-1}+\sqrt{y-1}=2 & \color{red}{(2)} \\ \end{cases}$
